It’s important for puppies to learn to control their bites. This is best taught at a young age.
Carefully watch your puppy for signs that he is about to grab your hand. Before he can do that, give him a soft toy or a Kong as an alternative.
If puppy bites you before you can give him a toy, make the squealing sound a littermate would make when it is bitten by another pup – “eek” or “ouch”. Then quickly redirect the puppy to an appropriate toy that is “chew safe”.
When a puppy can’t be supervised he should be safely in his crate or an exercise pen with Kongs or other dog-safe toys that can’t be chewed up and swallowed. DO NOT LEAVE STUFFED TOYS IN A CRATE WITH A PUPPY. Talk with your breeder and/or vet about safe toys for puppies.
Also, a tired puppy is a good puppy. Be sure your puppy gets plenty of exercise for his body and his brain (but a 1-mile walk or more is WAAAAAAAY too much until the joints knit). Exercise for 10 minutes every hour or so is better than 2 hours at a time. Puppies need naps just like babies.
Start training at an early age in a good puppy class in your area. Puppies of all breeds get your puppy used to other types of dogs.